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(No Model.) y ZSheets-Sheet 1.

' l G. LENTZ.

Tank Locomotive. No. 231,337. Patented Aug. 17,1880.

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(No Model.) 2 Sheets-Sheet 2.

G. LENTZ.Y Tank Locomotive. No. 231,337.. Y Patented Aug. I7, 1880.

#5f/wedded, Zwan ZW' www %/M GUSTAV LENTZ, OF DUSSELDORF, GERMANY,ASSIGNOR TO THErGTIEN- GESELLSCHAFT FUER LOCOMOTIVB'AUHOHENZOLLEltN,--OF `S'AME PLACE.

TANK-LOCOMOTIVE.

SPECIFICATION formingpart of Letterslatent No. 231,337, dated August 17,1880.

Application filed J une 7, 1880. (No model.) Patented in Germany August2, 1879, in Belgium August 27,1879, in Denmark March 16, 1880, in FranceAugust 2S, '1879, in Great Britain August 30, 1879, in Italy September30, 1879, in Austro-Hungary December 31, 1879, and in Sweden October 4,1879.

To all whom 'it may concern Be it known that I, GUSTAV LENTZ, a subjectof the King of Prussia, residing at the city of Dusseldorf, in theGerman Empire, have invented certain new and useful Improvements inTank-Locomotives; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertainsto make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which forni a part of thisspecification.

My invention relates to a novel combination and arrangement of thesteam-cylinders and drive-wheel axles of tender-locomotives, moreespecially designed for high speed; and it consists, essentially, in therelative arrangement and combination of the drive wheel axles, thesteam-cylinders, their piston and driving rods, with the fore and aftcoupled drive-Wheels, substantially as hereinafter more fully described.

Many effortshave been made, heretofore without good results to constructtender-locomotives for high speed, and such results can only beobtained, with widely-separated drivewheel axles, by avoiding as much aspossible overhanging structural masses and in so loeating the cylindersas to avoid the jerking action of the piston-rods on the crank or wristpins, and the consequent irregular movement of the machine.

If the steam-cylinders are located above the drive-Wheel axles, as isthe case with all such locomotives now, it is an impossibility to locatethe drive-wheel axles far apart, and hence their axles are locatedcomparatively near each other, in order to obtain a sufficiently long`driving-rod, and avoid as much as possible the jerking action upon thewristpins, and this necessitates the use of runners, as in the Cramptonand other systems, while such locomotive-tenders are not adapted forhigh speed.

In the accompanying drawings, Figure l is a side elevation, and Fig. 2 aplan view, both partly in section, illustrating the application of myinvention.

The tender-locomotive may be constructed in any preferred manner and ofany desired pattern or style, as I do not claim any improvements in theconstruction of such locomotives, except in so far as the peculiararrangement of steam-cylinders relatively to the drive-wheel axles isconcerned; and in the above drawings A and B represent the fore and at'tdrive-wheels, respectively, and A and B their respective axles, thelatter, B', being located behind the tire-box in order to increase thedistance as much as possible between said axles and dispense with theusual runners.

C C are the steam-cylinders, located on the main frame F of thelocomotive, between the said frame and the connecting-rods D, thatconnect the drivers together, and between the axles of said drivers,either in a horizontal position or in a slightly-inclined position, butas near as possible in the plane of motion of the connecting-rods D.

The piston-rods and slide-valve rods are connected in any usual manner,respectively, to the wrist-pin b of the rear drive-wheel and to the axleof the latter.

It will be apparent that by means of the above-described relativearrangement ofsteamcylinders and coupled drive-wheel axles I am enabledto dispense with the usual runners, do away with overhanging structuralmasses, obtain a perfectly smooth and even working of the drive-rods andpiston, and adapt the tender-locomotive to high-speed service betterthan any machine of this class heretofore constructed.

Having now described my invention, what I claim, and desire to secure byLetters Patent, is

Iua tender-locomotive, the combination, main frame, all constructed andarranged sub- 1o with the main frame, the fore and aft drivers,stantially as described, for the purpose speciand their axles, the axleof the latter being fied. located in rear of the fire-box, the connectIn testimony whereof I affix my signature ingrods D, and the usualcrank-rods, con in presence of two Witnesses. ueeted with the wrist-pinsof the rear drivc- GUSTAV LENTZ. wl1ee1s,oi` the steam-cylinders C,located in, or praetiealhin, the plane of motion of the coupling-rods,and between the latter and the W'ituesses L. MOTIG, FRIEDR. WENGKE.

